Canvas bug : logo blinking on IE/Edge + another "bug" report :)

Hello,

I noticed a few bugs and I thought it would be better to share it :) (maybe for later updates).

1. On IE11 and Edge, there is a "glitch" with the header and logo when starting scrolling down on the demo page (logo blinks and it seems to go up instead of resizing) :
   http://themes.semicolonweb.com/html/canvas/header-light.html

The problem is more present and obvious when the logo is bigger (blinking) :
http://test.wedding-table-plan.com/
(user : canvas / pass : canvas)

Is there any fix or workaround to avoid that ?

1. I think media query breaking points (for max values) in CSS should be like in Bootstrap 4 :

• 1199.99px instead of 1199px
• 991.99px instead of 991px
• 767.99px instead of 767px
• 575.99px instead of 575px
  Otherwise, it creates graphical problems when positionning the browser at an exact width of 991 or 767 or 575 px.

Although, I managed to fix the second point, I would appreciate any lead on the first problem. ;)
Thanks.